79805530 has 64 divisors (see below), whose sum is σ = 169869312. Its totient is φ = 26429760.

The previous prime is 79805527. The next prime is 79805581. The reversal of 79805530 is 3550897.

It is a self number, because there is not a number n which added to its sum of digits gives 79805530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417735 + ... + 417925.

It is an arithmetic number, because the mean of its divisors is an integer number (2654208).

Almost surely, 2^79805530 is an apocalyptic number.

79805530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

79805530 is an abundant number, since it is smaller than the sum of its proper divisors (90063782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79805530 is a wasteful number, since it uses less digits than its factorization.

79805530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 79805530 is about 8933.3940918332. The cubic root of 79805530 is about 430.5375106200.

The spelling of 79805530 in words is "seventy-nine million, eight hundred five thousand, five hundred thirty".